Air conditioning apparatus

Details Air conditioning apparatus Air conditioning apparatus

1992-12-24

1994-10-18

Wayner, William E.

Refrigeration

Automatic control

Of external fluid or means

62 90, 623244, F25D 1706

Patent

active

053556909

ABSTRACT:
An air conditioning apparatus suitable for an electric powered automobile, where at least one of a heating and a dehumidifying operation is effected by utilizing a refrigerating cycle. An upstream heat exchanger and a downstream heat exchanger are arranged in a duct through which air passes for air conditioning. An outside heat exchanger with an outside fan are further provided, which act as a condenser in a cooling mode, although a refrigerant passes therethrough when using the heating and the dehumidifying modes. Upon use of a dehumidifying mode, the upstream heat exchanger acts as an evaporator, while the downstream heat exchanger acts as a condenser. The temperature of the refrigerant sensed by a temperature sensor at the outlet of the compressor if higher than a predetermined value (110.degree. C.) when in the dehumidifying mode causes the outside fan to rotate, thereby increasing the condensing ability at the outside heat exchanger, reducing the amount of liquid refrigerant in the outside heat exchanger, and increasing the amount of liquid refrigerant in an accumulator, thereby preventing the temperature of the refrigerant from the compressor from increasing.

REFERENCES:
patent: 3403314 (1968-09-01), Maynard
patent: 3738117 (1973-06-01), Engel
patent: 4920756 (1990-05-01), Howland
Iritani, et al appln. Ser. No. 07/873430 (see subject Appln. p. 1).

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